feat: add collectors and rules

40-rules/ledger_hash_chain_intact.sh

@@ -0,0 +1,65 @@
+#!/usr/bin/env bash
+set -euo pipefail
+source "$(dirname "$0")/../scripts/lib/common.sh"
+require_cmd jq
+
+EVID_DIR="${1:?usage: ledger_hash_chain_intact.sh <evidence_dir>}"
+TS="$(iso_utc_now)"
+
+FILE="$EVID_DIR/ledger_verify.json"
+if [[ ! -f "$FILE" ]]; then
+  json_emit "$(jq -n --arg ts "$TS" '{
+    version:"1.0.0",
+    rule_id:"ledger.hash_chain_intact",
+    control_ids:["AU-01","AU-02"],
+    passed:false,
+    severity:"CRITICAL",
+    timestamp:$ts,
+    evidence:[{path:"ledger_verify.json"}],
+    details:{error:"missing evidence file"}
+  }')"
+  exit 0
+fi
+
+COLLECTED="$(jq -r '.collected // true' "$FILE")"
+if [[ "$COLLECTED" != "true" ]]; then
+  json_emit "$(jq -n --arg ts "$TS" '{
+    version:"1.0.0",
+    rule_id:"ledger.hash_chain_intact",
+    control_ids:["AU-01","AU-02"],
+    passed:false,
+    severity:"CRITICAL",
+    timestamp:$ts,
+    evidence:[{path:"ledger_verify.json"}],
+    details:{error:"ledger verify not collected"}
+  }')"
+  exit 0
+fi
+
+OK="$(jq -r '.ok // false' "$FILE")"
+ENTRY_COUNT="$(jq -r '.entry_count // 0' "$FILE")"
+FAILURES_JSON="$(jq -c '.failures // []' "$FILE")"
+
+if [[ "$OK" == "true" ]]; then
+  json_emit "$(jq -n --arg ts "$TS" --argjson count "$ENTRY_COUNT" '{
+    version:"1.0.0",
+    rule_id:"ledger.hash_chain_intact",
+    control_ids:["AU-01","AU-02"],
+    passed:true,
+    severity:"CRITICAL",
+    timestamp:$ts,
+    evidence:[{path:"ledger_verify.json"}],
+    details:{entries_checked:$count}
+  }')"
+else
+  json_emit "$(jq -n --arg ts "$TS" --argjson count "$ENTRY_COUNT" --argjson failures "$FAILURES_JSON" '{
+    version:"1.0.0",
+    rule_id:"ledger.hash_chain_intact",
+    control_ids:["AU-01","AU-02"],
+    passed:false,
+    severity:"CRITICAL",
+    timestamp:$ts,
+    evidence:[{path:"ledger_verify.json"}],
+    details:{entries_checked:$count, failures:$failures}
+  }')"
+fi